iPhone X Ringtone Not Working - Pseudo Soldering

REWA 10/03/2018

Pseudo soldering components may result in multiple problems on an iPhone. This soldering issue of chips may be related to several reasons:


1. Manufacturing defect when leaving factory;

2. Misoperation when running a logic board repair;

3. Bad habits of its users etc.

This time we will share you with an iPhone X no ringtone sound repair case caused by pseudo soldering of the motherboard after being dropped.


The phone features a broken screen and a deformed housing.


iPhone X Ringtone Not Working


Get a new display assembly installed and test. The phone turns on normally. After a series of test, we found out that there is no output sound when selecting a ringtone. Yet the sound works fine with a headphone plugged in.


iPhone X Ringtone Not Working


The preliminary judgment is that the audio circuit is in normal condition. It’s just that the bottom speaker is not working. Remove the display assembly and disconnect the battery. Disconnect the charging port flex cable.


iPhone X Ringtone Not Working


Run diode mode measurement of the DOCK connector. The measured value is normal. Which indicates that the bottom speaker is in normal condition.


iPhone X Ringtone Not Working


Run diode mode measurement


Continue to measure the connector on motherboard. The relevant circuit of one Pin has been open-circuited.


iPhone X Ringtone Not Working


measure the connector on motherboard


Remove the upper layer with Hot Air Gun. There are multiple missing pins on the upper layer.


iPhone X Ringtone Not Working


Judging by this, the phone has been dropped. Which resulted in pseudo soldering of the motherboard and detachment of pins. Remove tins on cylinders and bonding pads of the upper layer. Clean with PCB Cleaner afterward.


iPhone X Ringtone Not Working


Remove tins on cylinders and bonding pads


Run diode mode measurement of Pin S162 and Pin S163. The measured value is normal.


iPhone X Ringtone Not Working


Judging by this, the open-circuited condition is caused by pseudo soldering of cylinders around the edge of the lower layer.


Get the motherboard installed to the testing kit and test. Current reading on the ammeter is normal. Go to Settings>Sounds&Haptics>Ringtone. Select a default ringtone. Normal output sound this time.


iPhone X Ringtone Not Working


We can confirm now that the fault is caused by pseudo soldering of cylinders around the edge of the lower layer. Now we can solder the two layers together. Before soldering, treat Pin S166 with jumper wiring.


iPhone X Ringtone Not Working


Next, let’s get the lower layer reballed. And re-solder the motherboard.


iPhone X Ringtone Not Working


Assemble the phone and test. Go to Settings>Sounds&Haptics>Ringtone. Select a default ringtone, normal output sound this time. Fault cleared.


Attaching the video for more details about the iPhone X Bottom Speaker Not Working Repair - Pseudo Soldering


Tools Used:

* Communication Maintenance Power Supply

* Digital Soldering Iron Rework Station

* Digital Hot Air Rework Station - 861DW

* Integrated Mobile Phone Repair Platform

* Logic Board Tester for Apple iPhone X

* Digital Multimeter* Multifunctional PCB Holder for iPhone X

* Straight Tweezer

* Curved Hook Tweezer

* BGA Strip Flux Soldering Paste

* High Purity Rosin Soldering Flux

* Repairing Drawings

* Stainless Steel BGA Scraper


More Guides About iPhone X Series, You Can Read


How to Fix iPhone X Won’t Turn on With Logic Board Repair


Fix iPhone X Keeps Restarting – Logic Board Repair


How To Fix iPhone X Face ID Not Working


iPhone 8/8 Plus/ X Ambient Light Sensor Issues

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